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HomeScaleAircraftScale HeliScale Helicopter Main Discussion › 600-700 size scale huey head
12-09-2012 01:41 AM  5 years agoPost 1
Mojave

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Palos Verdes, Ca. USA

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So I saw this 700 size scale huey head on skyhunters site and for $189 decided to give it a try. It appears fairly well built and is advertized as pre-built. The blade grips are installed from the factory, but it wasn't ready to fly. I disassembled it and found that there was no grease on the thrust bearings and no loctite had been used in the assembly. Basically it was ready to be built...

A few things I noticed about the head: Flybar is stationary and for looks only. Blade grips are 12mm with a 5mm hole, so varios scale blades with 14mm root won't fit But I'm fixing that by machining 1mm per side out of the grips. Standard 700mm blades with a 12mm root will fit. The head is set up for right hand trailing edge control, but I modded it for rt hand leading edge control for testing on my rex550 mule. I can change it to left and leading edge control when I put it on my vario UH1D. It's a ridged head design with no dampers and billet aluminum head block and grips. When I took it apart, I noticed that they were using 2 o-rings as spacers between the blade grips and head block, so I machined aluminum spacers to take their place.

I installed it on my rex550 test mule stretched to 600 (with a 10/12mm spacer)and flew it with Century 640mm woodies that I had in the attic. It was smooth, no hiccups and spun true. Here's a link to the site:
Barry

http://www.skyhunterhobbys.com/Trex...-rc-helicopter-

700-UH1-cnc-head-system-UH-1700H.htm

All helis and planes have an expiration date stamped on them...you only find it after you crash!!

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12-09-2012 03:16 AM  5 years agoPost 2
stunt4fun

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So Cal - usa

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I like your spacer idea instead of the rubber O-rings, how can I get my hands on a set?? Thanks for testing out this fine looking rotorhead.

Ken

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12-11-2012 12:33 AM  5 years agoPost 3
TaylorDrain

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California

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Nice work Barry. Good to let people know that they need to take it apart to grease and locktite all screws. Do you have a build thread on the Huey? Are you building the Vario fuse?

Taylor

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12-11-2012 01:59 AM  5 years agoPost 4
Mojave

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Palos Verdes, Ca. USA

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Hey Taylor, is that Gazelle flying yet? You def gotta PM me when you maiden it, I'd like to be there.

Yes, I started a vario 1100 UH1B build quite a while back, but put it on the back burner when I decided to do a full detail build on it. This head is going on that heli. After flying the bigger helis, it seems kinda small I was tempted to sell it and build a turbine sized 412 on e-power, but I think I'll get her flying over the xmas holiday. Here's the link:
Barry

https://rc.runryder.com/t595748p1/

All helis and planes have an expiration date stamped on them...you only find it after you crash!!

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12-11-2012 04:59 AM  5 years agoPost 5
TaylorDrain

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California

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I keep the maiden and first flights pretty private, but when she is up and flying we will have to get together and do some flying.

I am looking into a UH-D build but not sure if I want to do electric or JetCat PHT2. I like the idea of something on the smaller side. do you have a paint scheme yet, I remember talking to you about some ideas but understand if you want to keep it a surprise

Taylor

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12-12-2012 12:45 AM  5 years agoPost 6
Mojave

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Palos Verdes, Ca. USA

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Understood. Maiden flights always make me nervous, so I like to keep spectators to a minimum.

I haven't decided on a paint scheme yet.
Barry

All helis and planes have an expiration date stamped on them...you only find it after you crash!!

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12-12-2012 02:42 AM  5 years agoPost 7
coptercptn

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Mesa AZ. USA

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Kudos Barry, on the "upgrade" of a basically "flawed" head.. This coming from one (of two) of us here locally that had both heads lterally self distruct on the maiden spool-ups....

Have you tried the (Machined)larger blade grips???? I was a bit hesitant to hang 810's..

Home of the "Sea Cobra".....

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12-12-2012 03:06 AM  5 years agoPost 8
Dr.Tim

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Mojave Desert

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I flew the scale head for a couple of years ... Flew nice!

Vario Gasser with 810mm blades.

From Simple minds come simple ideas! Approach Engineering

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12-12-2012 03:40 AM  5 years agoPost 9
Mojave

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Palos Verdes, Ca. USA

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Copter: Thanks bud. Wow, what went wrong with the heads Do you know of an upgrade blade grip that will fit this head? I was told that these grips are all that are available. Both the 600 and 700 size use the same grip, but the 700 size has a 5mm hole for the blade bolt. Both Ken and I have this same head and I'm modifying his also. My plan was to tool it up on the mill and remove 1mm from each side of the grip, so that my vario scale blades will fit. The grips are beefy enough for that mod.

Tim: I have always liked the paint job on that huey...super cool You have the fully functional flybar on that head, which is a nice feature. I was wondering how it would fly with vbar and a functioning weighted flybar.
Barry

All helis and planes have an expiration date stamped on them...you only find it after you crash!!

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12-12-2012 04:43 AM  5 years agoPost 10
2tall

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Crystal Lake, Illinois, USA

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Barry - mine was the other head Jim mentioned in his post, it was on my Vario 1100 UH1D. The head came with a swash and follower. The follower was the culprit. The follower arms pivot on pin shafts that were held in place by tiny, somewhat hidden grub screws. One of those pin shafts exited in flight essentially feathering the connected blade. Damage was limited to a new set of skids and cross bows. After the crash I located the grub screw on the pin shaft that did not fail. It is soooo tiny that none of my hex drivers would fit, and I have not been able to locate a driver small enough at any of my local providers including the usual home centers and Northern Tool.

I noticed that you are not using the Skyhunter swash or follower, so your head may be just fine. Mine flew very smooth for the few minutes before the follower failed.

Jon

"Pay attention...lest the ground rise up and smite thee."

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12-12-2012 02:49 PM  5 years agoPost 11
Mojave

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Palos Verdes, Ca. USA

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Gotcha. Yeah, I decided not to use the swash and follower that came with mine. I didn't want to change eveything for the reversed collective etc.. Bummer on your stuff flying apart, that always sucks. After going through this head and making the few mods and changes, I feel confident that it will hold up. It would be nice if the grip spindles had some coning angle built in, then it would really look the scale part This would have been so easy to do, since the spindles are seperate parts and retained with bolts... Oh well, ya can't have it all
Barry

All helis and planes have an expiration date stamped on them...you only find it after you crash!!

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01-23-2013 04:11 AM  5 years agoPost 12
stunt4fun

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So Cal - usa

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Hey Barry
I think I found a way to make the top weighted head articulate with the swash like it should. And it would be an easy mode I believe? Ill have to get ahold of ya soon and figure this out. If we can do it do you think it would make the Heli fly better then leaving it alone?

Ken

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01-23-2013 05:52 AM  5 years agoPost 13
Mojave

rrElite Veteran

Palos Verdes, Ca. USA

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We can have a look at it and give it some serious thought. I think that we possibly could get the vbar to work with it, maybe with some phasing adjustments...

All helis and planes have an expiration date stamped on them...you only find it after you crash!!

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08-04-2013 10:26 AM  5 years agoPost 14
808HeliBoyz

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Kailua, Hawaii

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that head is it a flybarless or a flybar head?

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08-04-2013 04:55 PM  5 years agoPost 15
Mojave

rrElite Veteran

Palos Verdes, Ca. USA

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It's FBL. Here's the latest. Skyhunter has discontinued this head because of issues with the manufacturer. This is a shame, because it was a good looking head. But, there is a company out of Germany (sportsmoto) that is planning a release of a very nice looking huey head.
Barry

All helis and planes have an expiration date stamped on them...you only find it after you crash!!

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08-05-2013 10:00 PM  5 years agoPost 16
bell222

rrApprentice

Australia

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Hi Barry
that head you are talking about will be produced by DC heads and will be available shortly from me
Sportsmoto do not make anything
you will also get it from were you got your starflex as they are family

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08-06-2013 03:37 PM  5 years agoPost 17
Mojave

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Palos Verdes, Ca. USA

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10-4 SportsMoto is just listing it on their website as a future item in the scale lineup.
Barry

All helis and planes have an expiration date stamped on them...you only find it after you crash!!

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